javascript - Change url of button depending on input text -


i have created form fields button.

i need url of button change depending on data entered in last name field. booking reference field not effect url

example: user enters "john" in last name field button should have url: http://www.john.com

example: user enters "henry" in last name field button should have url: http://www.henry.com

<form>    <p style="margin-bottom: -10px; font-size: 12px;">*required fields</p><br>    <input type="text" placeholder="last name *" name="lastname">            <input type="text" placeholder="booking reference *" name="ref">      <a href="http://localhost:8888/ek/booking/" class="btn btn-info" role="button">retrieve booking</a>          </form>

you can use blur event on lastname achieve this,

$('input[name=lastname]').on('blur', function(){  debugger     var lastname = $('input[name=lastname]').val()     //check if last name there     if(lastname.length !== 0){        var link = 'http://www.'+ lastname +'.com';        $('.btn.btn-info').attr('href',link);     }  });
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>  <form>    <p style="margin-bottom: -10px; font-size: 12px;">*required fields</p><br>    <input type="text" placeholder="last name *" name="lastname">            <input type="text" placeholder="booking reference *" name="ref">      <a href="http://localhost:8888/ek/booking/" class="btn btn-info" role="button">retrieve booking</a>          </form>


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